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Bath City of

Sewage treatment plant, major discharger, Bath, Maine. NPDES permit ME0100021 expired Dec 31, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (31 values), outfall 002 form A monthly (10 values), outfall 002 form B monthly (7 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
5 values over a limit, 0 required values missing, 0 of 36 reports late

Limits in force (48)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 876 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 1314 lb/dall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendeddaily maximum≤ 50 mg/Lall year001
Solids, total suspendedmonthly average≤ 876 lb/dall year001
Solids, total suspendeddaily maximumreport only (lb/d)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (lb/d)all year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedweekly average≤ 1314 lb/dall year001
Solids, settleabledaily maximum≤ .3 mL/Lall year001
Coliform, fecal MF, MFC broth, 44.5 Cmonthly geometric mean≤ 14 #/100mLall year001
Coliform, fecal MF, MFC broth, 44.5 Cdaily maximum≤ 31 #/100mLall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualmonthly average≤ .1 mg/Lall year001
Chlorine, total residualdaily maximum≤ .37 mg/Lall year001
Enterococcimonthly average≤ 8 #/100mLApr–Oct001
Enterococcidaily maximum≤ 54 #/100mLApr–Oct001
Mercury, total [as Hg]monthly average≤ 30.9 ng/Lall year001
Mercury, total [as Hg]daily maximum≤ 46.3 ng/Lall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Flow rateminimumreport only (gal/min)all year002
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year002
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year002
BOD, 5-day, 20 deg. Cdaily maximum≤ 8206 lb/dall year002
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
Solids, total suspendeddaily maximum≤ 18423 lb/dall year002
Solids, total suspendeddaily maximumreport only (lb/d)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all year002
Chlorine, total residualdaily maximum≤ 1 mg/Lall year002
Chlorine, total residualdaily maximumreport only (mg/L)all year002
Coliform, fecal generaldaily maximum≤ 200 #/100mLall year002
Coliform, fecal generaldaily maximumreport only (#/100mL)all year002
Overflowsmonthly totalreport only (occur/mo)all year002

How strict are these limits?

Cited limits by parameter: Maine's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/ME0100021 · MCP: https://passage-data.com/mcp